SLACK COOPERAGE 137 



EQUIVALENTS 



There are no universally adopted figures of the number of hoops, 

 staves and headuig of given sizes that may be cut from icxx> bd. ft. 

 of logs or from a cord of bolts. However, the following equivalents are 

 accepted by a large number of companies: 



For an average run of logs, about 2400 staves 30 in. in length and 4 in. 

 in width may be cut from 1000 bd. ft. of logs measured by the Doyle 

 rule. It is said that in Arkansas i cord of bolts 32 in. in length measured 

 with the bark will yield icxxs staves or without bark 1200 staves. Bolts 

 of this length are usually stacked 4 ft. and 12 ft. long, which makes the 

 standard cord of 128 cu. ft. 



When the dry thickness of heading is ys in- ^^^ iQs i^- ^^ diameter, 

 1000 bd. ft. of logs, Doyle rule, will yield 2000 pieces of heading, or 

 about 400 sets. 



Measured by the same rule, 1000 bd. ft. will yield 4000 cut hoops 

 or 30CXD sawed hoops. 



STOCK WEIGHTS 



The following is a list of weights adopted by the National Slack Coop- 

 erage Manufacturers' Association in 1915. The heading is kiln-dried; 

 the staves are thoroughly air-dried, and the hoops are in the usual air- 

 dried condition for shipment. 



Staves 



Elm, North of the Ohio River. Weight Per 



Thousand Pieces 



285 in. staves, cut 5 to ij in., avg. 4 in. wide 780 lb. 



30 in. staves, cut 5 to i^ in., avg. 4 in. wide 830 lb. 



32 in. staves, cut 5 to 15 in., avg. 4 in. wide 885 lb. 



34 in. staves, cut s to ij in., avg. 4 in. wide 945 Ib- 



S3 in. staves, cut 5 to ij in., avg. 4 in. wide 91S lb. 



28^ in. staves, cut 6 to 2 in., avg. 4 in. wide 680 lb. 



Elm, South of the Ohio River. 



2SJ in. staves, cut 5 to i| in., avg. 4 in. wide 800 lb. 



30 in. staves, cut 5 to 15 in., avg. 4 in wide 840 lb. 



32 in. staves, cut 5 to i| in., avg. 4 in. wide 92S lb. 



34 in. staves, cut 5 to i| in., avg. 4 in. wide 1000 lb. 



28I in. staves, cut 6 to 2 in., avg. 4 in. wide 700 lb. 



Gum, Mixed Staves. 



28I in. staves, cut 6 to 2 in., avg. 4 in. wide 700 lb. 



